Art of forming and attaching cast-metal handles to cutlery.



J. F. LAMB.

ART OF rommfi Am) ATTAGHING CAST METAL HANDLES T0 CUTLERY.

APiLlfiATloN FILED APR. 5, 1912 Patented @1122, 1913.

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To al l w kom it may concern:

15 1 is}; sideele'vation of a handle blank for a mm; n. ms, on NEW an.

Am, confinement, Newman mo'mnnnas, rnAaY- a annex, or; new nmram; ostmort m; a onrozaa'imon'.

' .mrorjroam'ms we Arm'ofims'cAs'r-mEmnHANnLEs TO'CUTLEBY.

it"known. that I, Josnrn LAMB, a c t zen of the United States, residing at-New Britain, in the county of. Hartford and cut lery, and the objects of my improvement areeconomy' in production. and efiiciency andsuperiority of the product. Y-gIn he accompanying;- drawings :-..-Fi gure kitchen-knife: .Fig. 2 is" an itdview of the sameshowing thatend to ,which the. tool is to be applied; Fig. 3 is aside elevation thesaid'handle is designed, Fig. 4 is a broken ofi' sideflelevationof the said blade and handle'- attached and partly finished. Fig. 5' is a transverse section of the same j. broken off side elevation ofthe'finished'tool or knife. Fig.- 7 is an edge view of ahandle' blank of .amodified form, the same being designed for attachment to the form of blade and tang shown in Fig. Fig. 8 is tang tv a finished knife made from the blade and tangof Fig; 3 andthe handle blank ofFig. 7

j I have illustrated-my improvement as ap- 4 0 I first cast anialuminu'm handle blankA,

fin smooth metal molds and thereby produce a bright clean a'nd'fairly smooth soft metal handle-thatis free from sand or scale, and

'State of. Connecticut, have invented certain- 3 new and; useful lmproyements the Art of orming and Attaching Cast-.-Me'tal-Handlesi to Cutlerv,"-of which the following isla' fspecification. 10

and the blade finished before attaching the of'the combined blade and tang for which through the handle and tang. Fig. 6 is a a transverse section through the handle and sp m q b naea1 am. Patented Apr. 22,1913.

enough to' enable the handle tob'e at: tagged to its tang bypressure in dies when The knife-orbiter blade B and its tang ea may be madein any ordinary manner handle. It is customary in grinding and finishing the blade to operate upon the contiguous portion of the tang, while the major portion of the tang is left untouched and in the rough, This leaves the body or butt end of the tang a'trifle thicker than at its junc- -t1on with the blade. The rough or un;

ground portion 11 of the tang 1Q isfill us trated by shade lines in Fig. 3. If desired the same blade. and tang may be attached to the form of handle blank A shown in Fig- 7,in which the tang receiving opening 9 is in the form of a slot that extends through the smaller end of the handle blank from edge toedge.

The blade and handle blank are placed in suitable dies with the tang of the blade extended into the tang receiving opening and then, when cold, subjected to compression under confinement with sufiici'ent force to displace andrea rraxige the grainsof the metal while it is firmly compacted against the entire surface'ofthe tang and at the same'timebsuch displacement the whole handle is solidified and its surface hardened, so that the metal "willretain .its pressure Qagainstfjthe tang" without giving back or 'loosening-its' grip thereon, as would be the case-if the metal was merely. forced against the tang without- -thus solidifying and hardening I at; entire shell of the handle. in

order to'flthirs-solidify the surface it is' est.

sentialthatgthe dies, although" of the samegenerah'fdrm as the handle blank, should be a little"smaller so as to insure the com-' plete filling'of all-parts of the dies, leaving a slight fin of surplusmet'al 12 along the I T $5 finished handle but some wider, thicker and T 50 employ aluminum from which to cast the 55, anddress while at the same time it remains substantially in the desired form for the meeting line of the'dies at the edges of. the handle'as indicated in Figs. 453.1161 5. After removing the surplus metal or fin, the handle A is finished ready for bufiing as shown in Fig. 6. The operation is the 'same whether one form ofhandle blank or the other is-employ'ed-and there is no material difference in the product. The only dif .ference in fact is that with the handl blank A there is a seam 14 in the. material, extending along each edge which may be discovered by a critical inspection, while in longer. 'That end of the blank to which the .cutlery implement is to be applied has a .'-Y -tan g' receiving opening 9, preferably cast therein as shown in Fig. 2. I prefer to 10-8 handle blank on account of its lightness, its bright white and clean surface and its ada tability to be cast in metal moldsand me a cast n that is free fromsc'ale blank, both the handle blank A there is no such seam in the product, \Vith either form of handle edges of the tang are completely inclosed and the handle is attached thereto so firmly that it can never he accidentally detached or lodsened.

. aluminum may be subjected to the compressing operation when cold, thereby attaching the handlewlthout drawing the temper or otherwise injuring the previously finished blade. Formingand attaching the handles in the manner,v and of the material specified,

and then compressing the soft metal when under confinement in all directions and when cold lnsures a solid and firm attachment while'the several operations are inexpensive. 1

I claim as my 1nvention:- That lmprovement 1n the art of securing 'ing the said handle.

the blade to the'handle of a knife ln-lvlllch the tang of the knife is inserted in a recess ,in the handle and. the handle is subjected to pressure in dies so that'the walls of the said 'recess are closed oven the said tang. comprising providing a handle having a recess at one end and providing a blade in the rough and the said blade comprising a blade proper and a tang extending longl tudinallyfrom one end thereof, finishing.

\the surface ofthe said blade proper and at the same time finishing aportion of the said tang contiguous to the said blade proper, and leaving. the butt end thereofyin the original rough condition," the said reces s being suitable to receive the saidtang entire, including the said butt end and the adjacent finished portion thereof, inserting the said tang in the said recess and then compress;

- JOSEPH- F. LAMB. W'itnesses:

JOHN W. ABE L, OSCAR Monnnc. 

